Thread-controller.



m 0 mm 67 2 e n u I d e t n e t a P N A M R E M M A M W om 2 2 5 6 0 N THREAD CONTROLLER.

(Application filed Sept. 9, 1898.)

2 Sheets-Sheet I.

(No Model.)

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' No. e52;52a. Patented June 26, I900! W. M. AMMERMAN.

THREAD CONTROLLER.

(Application filed Sept. 9, 1898.)

(No Model) Nrrnn STATES WILLIAM M. AMMERMAN, OF NEXV HAVEN, CONNECTICUT, ASSIGNO'R TO EDWIN J. TOOF, OF SAME PLACE.

THREAD- -CONTROLLER.

SPECIFICATION forming part of Letters Patent No. 652,528, dated June 26, 1900. Application filedSeptcmbcr 9, 1898. $e1i lN 690,607. (No model-) To (tZZ whom it may concern:

Be it known that I,WI'LL1AM M. AMMERMAN, a citizen of the United States, and a resident of the city and county of New Haven, State of Connecticut, have invented certain new and useful Improvements in Sewing-Machines, of which the following description, taken in conncction with the drawings herewith accompanying, is a specification.

This invention relates particularly to the take-up and certain devices cooperating there with for acting upon and controlling the needle-tl1read during the formation of stitches.

As well understood,in the operation of forming the ordinary lock-stitcl1 the upper or needle-thread loop passes over or around the bobbin and bobbin-case, so as to interlock with the lower or bobbin thread, and should then in order to make a proper and desirable stitch be drawn up bythe take-up until the lock between the needle and bobbin thread is at the center of the fabric or goods being operated upon. It will therefore be obvious that the amount or length of thread given out for each stitch should vary more or less, according to the thickness of the work being operated upon, as if the work is thickit will necessarily require a greater length of thread to allow the loop to be drawn up into the work until the lock is at the center of the latter than it would if the work were of less thickness. Having in view the above facts, it has been one of the principal objects of my present invention to provide a simple and effective means for automatically regulating the proper length of thread required for each stitch according to the varied thickness of the work being operated upon.

Referring to the accompanying drawings, Figures 1 and 2 represent front end elevations of the armof a sewing-machine embodying my invention and a portion of the clothplate, showing the positions assumed by the parts where work of different thickness is be ing operated upon. Fig. ,3 is a central vertical section through the arm of the machine, at the front end thereof. Fig. i is a rear or inside view of the face-plate removed from the machine-arm, showing the several parts connected therewith forming part of the take-up and thread controlling and regulating mechanism.

To explain'in detail, (t represents a portion of the cloth-plate of the machine; a, the overhanging arm thereof; a the detachable faceplate in the front end of the arm b,the presser= bar; Z2, the presser-foot; b the needle-bar; b the needle, and b the driving-sl1aft, which is supported in suitable bearings in the arm a and adapted for operating the needle-bar, take-up, and the operating parts in the head of the machine. The above parts are of usual and well-known construction.

The take-up device in the present instance illustrated is of the rotary type and consists of two arms 0 c, which are fastened together at or near one end, with a proper space between the same for the'passage of thethread, by a pin or other suitable connecting-piece 0 This connecting-piece 0 over which the thread is adapted to be passed and carried, forms the take-up proper. The opposite or inner end of the arms 0 c are each supported in suitable oppositely-located bearings, one bearing being in the face-plate o and the other in a fixed overhanging arm or bracket 0 projecting from the said faceplate, as shown. The take-up thus having a hearing at each side thereof, whereby any springing or yielding of the same during operation is prevented, renders such take-up particularly desirable for heavy sewing, where the strain upon it is greater than in ordinary sewing. The described arrangementof the two arms of the takeup, in combination with the overhanging arm or bracket 0 also prevents the thread from becoming thrown off or disconnected from the take-up. The inner arm a of the makeup has a rigid connection with a slotted crank (1, located in the inner-side of the face-plate, through the medium of a fastening-screw d, as more clearly shown in Figs. 3 and 4. This crank-arm is operated to rotate the take-up from the crank-disk b in the end of the driving-shaft I) through the medium of the needlebar pitman b, which latter is provided with a pin 73 thereon, extending and operating Within the slot in the crank d.

In the operation of the take-up and during the time itlis moving downwardin aidirection to supply the. necessary length of threadfor the formation of the stitch, but before the hook or shuttle has entered the loop thrown out by the needle, there is a certain ing controller e, which is operated at the proper time to take up such slack in the. thread and then release the same as the looper engages with the thread-loop and begins to draw thesamein passing-it around. the bob- I bin. The controller e in the present instance illustrated consists of a lever e,which ispiw otally secured to the rear side of the faceplateta ,--asvmore clearly shown in l ig. A, and formed with the end thereof projecting;

outwardly 1th rough an elongated opening -e in the; said face-plate, so ast to GHgtLgQ5=With the-thread.-

The projecting thread-en gaging BHd DfF-lih? conxtrol ler isbent in the formsof 1a 0119161161 11 pen' :the .rea-n side of the-face-plate atse vandat Bits-v opposite end: connectedwithf theicon troller-le'verthrough-the mediurnzof a. lin-lee r By-thiswconst ruction iti will be nn-w de'irstood thatlas the: lower: end of therlevere iswibrated by'rthek cam-e itzwillcommunicate a rocking'movement ato -rthe .controllei levei thro ugh; thealin k e and causei ts 'outerthi'ead engaging -;end-fto rotate and' act npon the thread; aasr-befiore-described.-

In order that thezamonntorlengt hot thread giaien downwat-eachstitch'may; be automatic-r ally? regulated 'accordingrto" the thickness of' the-workabeing qoperated upon,'-I ha-ve'pror videdea movable eyelet or threadeguidef to v receivethe uppenthread g at a point between the: take-11p; and needle-to regulate the deliv ery ofjsthe sameti-n' a manner as Will herein-x afitenbewdesoribed. This th'readw'gnidei whichazhaving sin: lnindits -functi0n,l-mi'ght also: lee-properly termed a 4 controller; i con SlStSzOfi? anelbow-lever7 which is pivotally" supported' atfg upon the-inner aside: of the face-plateaa with T0116}? end projecting. but-1 wandlyi through an elongated openin g; f in; thenface-plate soas]to engage: with-the u pr-v perith-i'tead andeits opposite'en'd being bifur-cv cated-totembrace a pin oir-projectionf" in the pnessen bar; whereby & the lever; -with :its thread-guide, twill be'movab'le with the-latter."v

The: tprojectin g :th readsengagin g .:e n'dof 1 :the

their: ends being separableenable1the=thread to be readily inserted at any point into such inclosed-eyer Any suitableforln ofi eye or guide :othen than a thatjshown r m'ay be employed.

I will now proceed to describe the operation of the machine as described.

In threadingthe machine the threadis passed from the spool" or other supply over a-guid'e g;between the impinging disks of the latter to and under the controller 6, from the-latternp through the movable guide f and over the take-up,and then down again through said movable guide to the needle, all as clearly hown'in Figs.,.1 and Nowsupposing that 80 hin' goods, as shown at h in Fig. 1, are being operated up-on,=the -presser-foot is comparatively close to the c1oth-p1ate,and the guide f is at or adjacent'tozthe:left= end of-theslot f ini-thel face plateyinwhich position it remains while goods ofnthesarne thickness-areibeing v operated UPODL'; Asrthickerrgoods are"fednn;= de'r: the- =presser;.- asi shownwatih in "Fi'glu'fl, .l'thez;- pressen-barti'sacorrespondingly elevated and acts. 1] pon thea lever ac tolamovew the (guide? re to ward therighta likedi'stancezv Such nrovev ent of the guide e tofward the rightlessensw he: distance:between'theztake-uppirrand the heedle zthrough said. tguideccorrespondingly; and thus: giavesithe-increased:lengthof threadzg 5 necessary "for theincreasedthicknessaofm-aterial; as :will a box-readily nnde'rsto:od'-.f:=. During the followingsoperation' ofi'the =take-up int? drawing. from the spool*thernecessary leng.th:=: of thread :fo'rithe SIICGGGdllTg::SiiltClIylWhlGll *Ioo accomplishes atathe timewitt isdrawingnp th stitch; the guide? in itsach'angedpositionmow-' causes such increased length of threadwtotbe drawn from the: thread-supply assi-s required! for the-difierent thicknesses. of theaworkn .By jx I 05 means; 0t the: combinationz and ioperationazof partsi as-xabove described them amount; of threa'd 'necessary"to prodnceia uniform stitch-q' for goods: of varying thicknesses lisiautomatai ically: "regulated: Having thns setwforth Jmy. inventiont what i I clai mesmewy-and desire to'rsecure byLette'rs; 2 Patent of the: United- 8 tates;- is+ 1. In "a sewing-machine; the: ccombinationg of bracket-arm securednponrthetfaceplate n5 an d formed -Iwith. a pa'rt thereof extending; su-bstan-tiallyaparalletwith saidiface plateandwitha :spaceabetweenthersam'eyand a rotary" takeenp. embodying two-arms orplateshaw ing :api'n'r' orconnectio'n between theasa'me' xzo adjacent to one end for engaging with' thethread, and atitheir oppositeends being-supported in: oppositely-located bearings '-in theu face-plate -'-and in said" brac'kevarmy. .IGSPGCL; tivlely,- the said bracket-arm and take-upbe-v I 2 5 ing r-soconnected? as 1 to: prevent lateral dis placemen-tiofithe.:-thread frolnuthe latter; i 2. 111a sewingnnachi'ne, the r combinations with ;a ,rotary take-up; and "a slack-thread con'trolleigt'of. a'thread-guide-andstitch-con I30 troller; consisting rofw'a pivoted elbcw lever having. onezend :proj ecting through a slotin theface-pla'tet :and-sengaging with-the-threadat a point between the take-up and slackthread controller, and at its opposite end having connection with the presser-bar to be moved thereby, substantially as and for the purpose set forth.

3. In a sewing-machine, the combination, with a rotary take-up, and an oscillating slack-thread controller, of a thread-guide and stitch-controller, consisting of a pivoted lever having one end projecting through an open- IO ing in the face-plate and engaging with the thread at a point between the take-up and slack-thread controller, and at its opposite end having connection with the presser-bar to be moved thereby, substantially as and for the purpose set forth.

WILLIAM M. AMMERMAN.

Witnesses:

CHAS. F. DANE, FRED W. DANE. 

